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Did the car started to do that all of a sudden? Any check engine codes?
Maybe fuel pressure. To test if it's fuel pressure related, apply throttle and spray in some carb cleaner in the intake. It may backfire from the throttle body, so take care. If you can run the engine with the carb cleaner, the fuel pressure is too low.
I would guess that the timing chain is off, the ecu would trigger the spark way off the normal timing when throttle is applied.
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